Method for the manufacture of shuttle boxes



G. W. KRETZSCHMAR METHOD FOR THE MANUFACTURE OF SHUTTLE BOXES Oct. 19,1937.

Filed June 5, 1936 I l /6 Jilnvcntob /6 George 11 Mefzsc/rmag 15 molds.

Patented Oct. 19, 1937 PATENT OFFICE METHOD FOR THE MANUFACTURE OF vSHUTTLE BOXES George W. Kretzschmar, Garfield, N. J.

Application June 5, 1936, Serial No. 83,737

2 Claims.

The present invention relates to multiple shuttle boxes and moreparticularly to a new and use- I'ul'form of shuttle box and a method ofmaking the same without casting operations or the use of 5 molds as arenow generally employed.

In weaving operations with a loom equipped Withthe standard form ofshuttle box now in use, a; substantial loss occurs in the weavingoperation due to the factthat the thread from makingiof shuttle boxeshaving any desired number of cells, by which such cells maybe made Withgreater accuracy than by the methods heretofore used and by which theusual grinding and filingoperations may be avoided.

One ofthe objects of my invention is to pro- 'vide a form of shuttle boxwhich is adapted to.

prevent the thread from the shuttle getting caught or breaking duringthe passage of the shuttle from one side of the loom to the other.

Another object of the invention is to provide a novel form of shuttlebox which is provided with thread supporting means or channels in whichi the thread adjacent the shuttle may hang free or be supported so as.toprevent the thread from being caughtbetween the binder and shuttle inthe movement of the shuttle out of the shuttle box. I a

Another object of the invention is to provide a method for the making ofshuttle boxes by which such boxes maybe made with'greater accuracy,

' at a higher speed and at lower cost thanby the methods heretoforeemployed.

Another object of theinvention is to provide a method; for themanufacture of shuttle boxes 7 without casting and without the use ofthe usual scribed the operations of grinding and filing-in themanufacture of shuttle boxes may be entirely eliminated and a strongershuttle box construcv tionis obtained. 1

the shuttle'frequently gets caught betweenthe; binder and the shuttle,in spite of the fact that a Bymeans of the method hereinafter de- Various otherobjects and advantages ofthe,

invention will be apparent from the following detailed descriptionthereof.

' The various features of the invention are illustrated in theaccompanying drawing showing the preferred embodiment of the invention,in connection with which the method hereinafter described may be carriedout.

Inthe drawing:

Fig. 1 is a view in elevation of a form of shuttle box embodying myinvention, in which the position of the shuttles in the cells isindicated in dotted lines;

. Fig. 2 is a plan view of the shuttle box illustrated in Fig. 1 showingthe position of the binder and binder holding spring;

Fig. 3 is an enlarged detailed sectional View showing the preferred formof channels, the view being taken on the section line 33 of Fig. 1;

Fig. 4 is an enlarged fragmentary plan view showing the end portions ofthe shuttle box and illustrating the method of welding the joints orcontacting portions together;

Fig. 5 is a sectional View taken on the section line 55 of Fig. 4;

Fig. 6 is a View in perspective, partly in section takenon the sectionline 66 of Fig. 4; and

Fig. 7 is a fragmentary View of a shuttle leaving the shuttle box andshowing the thread in looped position supported by the floor channel.

Referring more in detail to the drawing, the form of the inventionillustrated is a two cell shuttle box, but it will be understood that amulticell box having any desired number of cells may be made inaccordance with the method herein disclosed. Y

In making the shuttle. box in accordance with the invention, the partsof the shuttle box are preferably first stamped out from strip steel andare then machined and formed to size. The various parts may then bereadily assembled by holding the parts in the desired relationship bymeans of fixtureclamps. The joints or parts are then welded together,preferably by electric welding, producing substantially perfectalinement of the parts, wherebythe faces of the shuttle box are smoothand do not require grinding or filing as has heretofore been necessaryin order to produce sufiiciently smooth faces.

It is to be emphasized that in carrying out this invention in itspreferred form, the parts are not assembled by the use of slots andlugs, but slots "are formed only in the end pieces and the longitudinalmembers are connected to the cross members or end members so as toproject half-way into the slots and the parts are then electricallywelded. The parts in which grooves are formed by joining the end pieceswith the longitudinal parts so that the latter project into the slotsare first :"used together with a carbon arc and the.

grooves are then filled with weld or weld steel.

In order to prevent the thread connected to the shuttle from gettingcaught between the binder and the shuttle, a channel is providedadjacent to but slightly below each cell of a the box which serves tocatch and support the thread in position longitudinally adjacent to theshuttle during the portion of the travel of the shuttle when it moves inthe box for its return stroke across the warp.

In forming the shuttle box in accordance with this invention thelongitudinal members 2, a, and 6 are first preferably stamped from stripsteel, it being understood that the proper numberof longitudinal membersare employed depending upon the number of cells to be provided in theshuttle box. The 'end part 8 is also preferably stamped out, beingbentso as to have the proper curvature at the portion it of the endplate. A suitable number of slots as 52, i l and is are then formed inthe end plate, the slots being of proper width so that the longitudinalmembers will exactly register with the slots. After the slots areformed, lug members it! are preferably welded in place adjacent theintermediate and end slots, the lug members being of proper length so asto be adapted for forming openings 2! in which bushings maybe inserted,if desired.

The plate member 22 is next formed, being pref erably stamped out fromstrip steel and machined with the slots 23, 2'5 and 27 corresponding innumber and size to those in the plate 3, so that when mounted inposition the slots of the member 22 will register withthe longitudinalmembers 2, 4, and 6 at the receiving end of the shuttle box. An end part26 is: also provided having slots as .26, 28, and 30 therein of a sizeadapted to register with the opposite ends of the longitudinal members2, i, and 5.

In attaching the guards or side strips 32, 34; 35, and 38, to. thecorresponding longitudinal members 2, G, and S, as shown moreparticularly in Fig. 6 of the drawing, the strips are weldedthrough thefull length thereof, the strips being set together half and half, thatis, the longitudinal member as (l, for example, is placed so as toprojecthalf-way into the space or groove between the side members 35 and34 and the groove 35 thus formed is filled with weld so as to make anintegral union. In a similar manner the part 32 is attached to thelongitudinal member 2, the

space adjacent the adjoining edges being filled with weld so asfto forman integral joint. In the same manner the strip 38is united to the part6 as will be clear from the drawing.

Referring now to Fig. 3 of the drawing, channels id and 3?. arepreferably provided adjacent the bottom of each cell so that in themovement of the shuttle out of the cell the thread will not be caughtbetween the binder M and the shuttle e8. It will be understood that inconnection with each cell of the shuttle box a binder as 44, shownmore'particularly in Fig. 2 of the drawing, is proor pivoted on lugmembers 45 which are preferably made integral with the longitudinal members 2, t, and 6, the lugs being provided with removable bushings M, asindicated in Figs. 2 and 4, of the drawing. The bushings are constructedso as to be readily replaceable when worn and thus serve to increase thelife of the shuttle box.

Spring members 56 and 58 are provided adjacent each binder as M and 53so as to maintain the binder in position for arresting the flight ofthe. shuttle.

Referring to Fig. 3, it will be apparent that the eyelets $9 and 62 ofthe shuttles 3 and 50 are cleared by the binder members at and 4% sothat the thread passing through the eyelets will be free to lay or besupported by the channels 48 and 42 in the floor members of the cells inthe manner indicated more particularly in Fig.7 of the drawing. Thechannels may obviously have any desired form, such as circular orangular in section or of other suitable form such as that shown in thedrawing, so'that the threadwhen contacting with the channel will moveaway from the floor of the cell, thus reducing'the tendency of thethread to be caught in any part of the cell or mechanism. 7

7 In the making of the various parts of the shuttle boxit will beobvious that the channels may be readily provided by stamping thelongitudinal members which are to constitute the floor of the cells fromstrip steel so that the channel is formed in oneoperatio-n in therequired form 1 in the longitudinal .member, which member is of a sizeto register with the corresponding slot or slots in the transversemember or members so that with a welding operation the box may beimmediately formed into its final form without filing or other finishingoperations.

It will be understood that in the movement of the shuttle across thewarp in the ordinary form of shuttle box there is a tendency for thethread to be caught by the binder and shuttle, even in spite or the factthat there is a groove providedf v in the shuttle so as to permit spacefor the thread to lay between the binder "and. the body of the shuttle.It is a. relatively frequent occurrence, however, that the threadbecomes entangled between the binder and the shuttle causing breakage ofthe thread. This is more apt to occur when the eyelet of the shuttle isat the far end of the box on one side of the loom, since in thisposition the thread becomes: looped or doubled to a greater extent thanon the other side of the loom where the eyelet is at the near end of theshuttle box, or nearer the warp threads.

By providing a channel of a form shown'in Fig. 3 of the drawing, thethread from the shuttle is permitted to hang relatively free andservesto hold the thread in doubled relation, preventing entangling or movinginto contact with the binder and adjacent face of the shuttle. Thebinders l l and 4% are preferablymade narrower than the standard form ofbinder in order to give additional space for the thread adjacent theshuttle in the movement of the shuttle in the shuttle box. y v

It will be apparent to those skilled in the art that various: changes ormodifications may be made in the. method of manufacture and in theformof shuttle box as herein described without departing from the spiritor scope of the invention as defined in the claims,

Having thus described the invention, what is claimed is: V j

1. A method for the manufacture of a shuttle intermediate longitudinalmembers and longitudinal guard strips, which comprises machining theshuttle box parts to size, assembling the parts thereof by clamping thesamein fixed relation so thatthe intermediate member engages guardstrips on each side thereof leaving a slot portion into which alongitudinal portion of the said portion and said spaces with weldmaterial to "unite the adjoining parts integrallytogethen 2. A methodfor the manufacture of a shuttle box from steel parts including upper,lower and intermediatelongitudinal members and longitudinal guard stripsfor the cells thereof, which comprises machining the shuttle box partsto size, forming a channel in said lower and intermediate longitudinalmembers to provide support in the floor of each cell for the threadadjacent the shuttle, assembling the parts by clamping the same in fixedposition so that the intermediate member engages guard strips on eachside thereof leaving a slot portion into which a longitudinal portion ofthe said intermediate member projects part way and the upper and lowerlongitudinal members engage guard strips so as to leave a space adjacenteach of the adjoining edges and filling the said slot portion and saidspaces with weld material to unite the adjoining parts integrallytogether.

GEORGE W. KRETZSCHMAR.

